Regulator for heating furnaces



' Now-3, 1925. 1,559,593

J. A. WELSH REGULATOR FOR HEATING FURNACES Filed Oct. 6, 1923 v 2sneeze-sheet '1 T0 mqsre 20 20 I 70 mmrr 000/? granule;

3 Jogqphfl Wel Nov. 3 1925- J. A. WELSH nsaunu on roa am'rme rumucns v 2Shoots-Sheet 2 I W I 4" Filed Oct. 6, 1933 Patented Nov. 3, 1925.

UNITED STATES Josnrn' .A. WELSH, or nomgmx, NEW YORK.-

REGULATOR ron HEATING FURNACES.

Application filed October 6, 1923. Serial No. 666,959.

To all whom it may concern: Be it known that I, JOSEPH A. WELsH, :acitizen of the United States, residing at Dunkirk, in the county ofChautauqua and State of New York, have invented'new and usefulImprovements, in Regulators for Heating Furnaces, of which the followingis a specification. i y a This invention relates to a regulator forheating furnaces, and particularly to acombined check and draft doorregulator'and boiler refill and pressure relief device gov erned by theexpansion andxcontraction of the water in the heating system. i

One object of the invention is to provide a simple, reliable, efiicientand inexpensive device of this character which will operate the checkdraft damper and draft door as occasion may require to maintain acertain temperature and which will allow any excess pressure in thesystem to escape and also supply any required amount of water to thesystem when the amount-contained therein falls below that required foruse. A further object of the invention is to provide a device of thecharacter described embodying. simple andv effective means whereby theworking parts may be adjusted or set for as sensitive an operation asdesired and to properly regulate the working actions of the check draftdamper and draft door to govern the furnace for maintaining any certaintemperature. I i The invention consists of the features of construction,combination and arrangement of parts hereinafter fully described andclaimed, reference .being had to-the accom panying drawings, in which: 1

Figure 1 is a central vertical longitudinal section through a regulatorof thecharacter described embodying my invention.

Figure 2 is a sectional end elevation of the same. T a Figure 3 is avertical transverse section on line 3--3 of Figure 1. a 1 Figure 4 isavertical transverse section on line 4-4 of Figure 1. I. T

In carrying myinvention into practice, I

heads a and "5 the parts being conne-ctedandE held assembled by bolts 6'"7, theilatterj being adjustable-8 3d. it look nut 7 bei-ng fproprovidea regulator comprising an upper weight 16";will'draw the arm 14 of videdto hold the tion. i a

The head 4 is provided at one side with a pair .of'upstanding lugs 8between which extends a. draft control lever?) ,pivotally consame inadjusted posinected with the lugs 8 byfa bolt orpin 10.

One end 11 of the lever 9 extends beyond the lugs and hasconnectedtherewith chains or other motion transmitting vconnections '12and 13, while the opposite end lljof, the lever extends through,aslotted gui'de yoke 15 and has connected therewith a controlling weight16. The chains 12, and13 are designed, in

practice, to be suitably connected respec-i tivel'y with'the check draftdamper and front draft door of the hot water heating furnace or. otherheater to which the device is applied, so that uponreverse movements ofthe lever 9, the draft damper and draft door will be alternatelyopenedand closed,

as will be readily understood. The slottedf guide yoke 15 is castintegrally with the head 4, and is'disposed diametricallybpposite thelugs 8 to properly guide the lever 9 in its movement. The weight .16 ispro- 5 vided for moving the" lever arm 14 downwardly and is adjustablyconnected there i with,said arm being provided with aseries of openings17 with any one of which the weight 16 may bepivotally engaged by a pinor bolt 18, whereby the weight may be disposed to govern the resistanceof the lever to movement under its controlling diaphragm as hereinafterfully described.

7 Disposedwithin the compartment 3 is a fluid pressure controlleddiaphragm 19, com prising a hollow body made of spring metal or othersuitable material closed at top and bottom and havingcorrugated sideswhereby it is adapted to "expand-and contract, accordion fashion. Thisdiaphragm is clamped; at its baseby a threaded bushing QOto the bottomhead 5 of the casing 1 and has pressed or otherwise fastened to itstopwall, a contact member 2l movable through an opening 22 in thehead",4i'and having a pointed or Wedge shaped end engaging the arm 14'ofthe lever 9 adjacent to its pivotal connection 10, whereby whenthediaphragm 19 expands, thearm 14 of the lever 9 will be raised andits-arm'll depressed and where b whenthe *"di' phragm 19 "contra ,l 9dow-nwardly and elevate thele'ver na- 11, throughwhich operation thechain's I 12* and 13.5 as pnlleddown or upanteurposes opening andclosing the check draft damper and front draft door connected therewith.

The bolt 7 has its upper end extending into the base of the slottedguide yoke 15 so as to form an adjustable lower stop for the lever arm14 and a screw 24: is threaded through the top of the yoke 15 and formsan adjustable stop to limit the upward movement of the lever arm 14, aamb nut 25 being provided to lock said screw 24 in adjusted position. Byneans of these stops the movements of the lever 9 may be positivelyarrested at regulated points to prevent strain upon the working parts ofthe apparatus contained in the lower compartment orgcasing 2.

The bushing 20 provides a fluid supply Connection between the chamber 2and the interior of the diaphragm 19, and also serves as a couplingconnection between the bottom wall or head 5 of the upper compartment 1and, the top or head of the lower compartment 2, and a Washer 26 andclamping nut 27 may be provided to clamp the headed end of this bushingfirmly and securely to the head 5 and to fix the base of the diaphragm19 thereto firmly against disconnection or displacement. The bushing 20further serves as a guide for an actuating rod 28 which extends upwardlytherethrough and into the diaphragm l9 and is suitably connected withthe contact member 21, so that the rod 28 will be raised and loweredwith the upper diaphragm wall as said diaphragm expands and contracts.

The casing. or compartment 2 is provided with an opening 29 forcommunication with r the boiler or water containing space of the tion.

heater, and is preferably open at one side, and'provide'd at itsopposite side with a detachable closure head '30 secured thereto byscrews or bolts3-1 ora screw thread connec- This head 30 serves'also asa manifold or valve chamber, being provided at top and bottom withpassages 32 and 33, communi cating with suitable threaded openings 34for connection "with pipes or conductors.

The passage 82 is designed for the discharge from the system of any'excess'pressure occurring therein under any excessive rise oftemperature, while the passage 33 is provided for the supply of water tothe boiler or heaterv for refilling the same in the event that, undercertain conditions replenishment of the boiler with water is necessary.These passages 32 and 83 respectively communicate withfithe chamber orcompartment 2 through ports 35 andB-G controlled by valves 37 and 38.These valves are adapted to move inwardly against proper seats formedatfthe'junctureof each passage with its port,

' 'theirjrespective passages 32 and. 33 to open d aid'valves arelmovableoutwardly intoalike in construction, each having a guide stem 39extending outwardly therefrom and sli'dable in a guide sleeve 40, saidsleeve in turn being. slidably mounted in an extension bushing orhousing 41 threaded or otherwise fitted into the outer side of the head30. A coiled expansion spring 42 encloses each valve stem between thevalve and its guide sleeve and exerts its expansive pressure to normallyhold the valve closed. An adjusting screw 43 is fitted in the outer endof each housing 41 and bears against the sleeve 40 and is provided foradjusting said sleeve to 'set it in proper relation to the valve and forregulating the tension of the spring 42, so that any degree ofsensitiveness of connection of the valve may be established andmaintained. A jamb nut 44 engages each screw 43 and is provided forlocking the same in adjusted position. Each stem 39 is provided with abore or passage 39', connecting the chamber 32 or 33 with the chamber ofthe sleeve 40, for permitting passage of air between said chambers inthe movements of the valve, and thereby operating to break any vacuum orcompression between the end of the valve stem and the interior of thesleeve 40, liable to causeinterference with the movements of the valve.

At its lower end the rod 28 is fitted in a guide plug 45 detachablythreaded in an opening 46 at the base of the casing, said plug havingachamber 47 beneath its guide opening and rod, to allow any particles ofsediment which may pass through the guide opening to be receivedthereinto and retained without interfering with the move ments of therod. The plug 45 may be removed at proper times for cleansing and topermit any sediment which may have settled in the chamber 2 to bedischarged through the opening 46 which thus serves as a sedimentdischarge passage. Above its guided lower end, the rod 28 is. formedwith a slot 48, the upperandlower end walls 49 and 50 otwhichprovidecontact surfaces. A rocker lever 51 is fulcrumed to the head 30 as at 52and said lever is provided with an arm 53 extending through the slot 48and ada ted to be engaged on reverse movement of the rod 28 by the saidcontact surfaces 49 and 50. The rocker lever is also provided withupwardly and downwardly projecting lugs or arms 54 and 55 each carryingan adjustable contact screw 55-adapted to be secured or locked inadjusted position by a jamb nut 57.. The contact screws 56 of therespective arms 54 and 55 are-disposed in alinementwith the valves-37and 38, and are arranged for contact therewith,- se that on reversemovement .-0f the rocker lever the ports 35'and 3-6 will berespeotivelyand contact screws and is normally closed by a plug or cap59, upon removal of which convenient access may be obtained to theinterior of the casing to permit adjustment of the contact screws andtheir jamb nuts, as may be required to regulate the action of'the valveactuating members on the valves enabling any degrees of sensitiveness ofaction to be obtained. It will be observed that the valves, rocker leverand all parts of the to maintain as far as possible,the combustion ofthe fuel in the furnace so as to keep the building in which the heateris arranged at a certain normal temperature. When this temperature isexceeded it will be understood that the diaphragm 19 will be expandedunder heat and pressure and W111 raise the lever arm 14 and lower thelever arm 11 to partially or wholly close'the front draft door orpartially or' wholly open'the check draft damper, the extent of openingand closing movement of the door and damper being governed by the degreeof temperature above the normal. If thls temperature should rise to avery high degree, the diaphragm'19 will be elevated to a maximum extentand the lever 14 also moved to raise its arm 14 and lower its arm 11' toa maximum extent, thus fully opening the check damper and fully closingthe draft door to cut off the draft to a maximum degree. At the sametime the contact 50 of the rod 28 will be elevated to such a degree thatit will engage the arm 53, of

rocker lever 51 and move said lever in the direction to cause thecontact carried by arm 54 to open the valve37 and thus allow the excesspressure to vent through. the opening 35 and passage 32. When thefurnace cools down the parts will be restored to normal position in anobvious manner.

In the event that through any cause,-suffi-' cient heat cannot begenerated in the boiler to produce normal pressure and the pressurefalls below the normal, due to the lowering or contraction of the watercontents of the boiler below normal, then the diapl-iragm 19 willcollapse to a maximum degree as a result of which lever 9 will beoperated to close the check damper and open the draft damper and at thesame time the Contact surface 4.9 of the rod 28 will enthe arm of'ro'cker lever 51- and move said rocker lever in the direction re verseto that previously described, causing the contact of arm 55 toengage andopen the valve 38 so as to allow water to enter through the passage 33and port; 36 for flow to the boiler, in order to replenish the sameto-the required'degree.' When this is done and the'normal pressure andtemperature is re-established, the diaphragm 19 will be expanded'to thenormal extent as a result of which the valve 38 will be closed and theparts restored to normal position shown in 'Flgure 1.

. From the foregoing description, taken in connection with the drawings,it will be seen that my invention provides a regulator of the characterset forth, and for the purpose described, which is simpleinconstruction,

reliable and efiicient in action and capable of being installed andmaintained'in proper working condition at ajcomparatively' low cost,also that the invention provides a device which will n'ot only controlthe draft in a reliable and efiicient manner but which will also allowof the automatic escape" of any excess or dangerouspressure and alsoprovlde for the replenishment 'of the boiler with a required quantity ofwater,

when, through any cause, the water in the boiler falls below that.required for service use. The construction of the device provided forthe purpose also enables ac cess to be conveniently obtained to anyworking part for convenience inkeeping the device cleaned "or repairingorreplenishmg any of its parts when the occasion requires. It may bestated that, when the device is installed, it will permit hot water fordomestic purposes to be drawn from the heating system, in which eventthe system will be replenished with water through passage 34, intochamber 33, and through port 36into lower compartment 2 and thence intothe boiler. I

Having. thus described my invention, I'

claim:

1. In a regulator of the character described, a pressure controlleddiaphragm, a rod actuated by the diaphragm, draft controlling meansgoverned by the rod, fluid supply and pressure relief valves, and arocker device operatively associated with 3. In ajregulator of thecharacter dev 1 scribed, apressure controlleddiaphragm, a

.rod actuated by the diaphragm, draft; conated by the rod for openingsaid valves onreverse movements of said rod.

'5. In a regulator of the character described, a pressure controlleddiaphragm, a rodactuated by the diaphragm, draft controlling vmeansgoverned by the rod, spring closedfluid supply and pressure reliefvalves, adjusting means for regulating the pressures .of said springs,arocker member actuated by the rod,and' adjustable contacts on saidrocker member a for selectively engaging and opening the valves.

6. Ina regulator of the character described, a pressure controlleddiaphragm, a rod actuated by'the diaphragm, draft controllingv meansgoverned by the rod, fluid supplyrand pressure relief valves, and arocker arm engageable with spaced contacts on the rod for selectivelyactuatingsaid valves.

7. In a regulator ofthe character described, a pressure controlleddiaphragm, a rod actuated by the'diaphragm, a pivotally mounted draftcontrollingllever governed by the rod, fluid pressure supply and reliefvalves, a rocker arm engageable with spaced contacts on the rod forselectively actuating said valves, and an adjustable stop for limiting,the retractive movement of the lever. e 8. In a regulator oftheicharacter described, the combination of an upper chamber, a fluidpressure controlled diaphragm in said chamber,a lower chamber incommunication with the upperchamber, a rod connected with the diaphragmand Y movable in said chambers, a draftcontrolling lever mounted on theupper chamber and gov: erned by the rod, and fluid supply and pressurerelief devices in the lower chamber, in-

eluding valves governed by the rod.

9. In a regulator of the character described, the combination of anupper chains ber, a fluid pressurecontrolled diaphragm in said chamber,a lower chamber in communication with the upper chamber, a rod connectedwith the'diaphragm and movable in said chambers, the said lower'chamberbeing provided with a passage for com: munication with a boiler and witha fluid pressure inlet and a fluid pressure outlet, a draft controllinglever mounted on the up per chamber and governed by the rod, and valvescontrolling said fluid pressure inlet and outlet and governed by therod.

In testimony whereof I affix my signature.

JOSEPH A. WELSH.

